Definition 2.8 (\(\alpha \) -representation [1]})
For some positive measure \(m_i^{\frac{1-\alpha }{2}}\) , the coordinate system \(\mathbf {\theta }=(\theta ^i)\)  derived from the \(\alpha \) -divergence is
\(\theta ^i = m_i^{\frac{1-\alpha }{2}} = f_\alpha (m_i)\) 
